Amazon.com: ALPHASONIK AS10DF 10 inch 1200 Watts 4-Ohm Down Fire Shallow Mount Flat Enclosed Sub woofer for Tight Spaces in Cars and Trucks, Slim Thin Loaded Subwoofer Air Tight Sealed Bass Enclosure :
Rockford Fosgate R2S-1X12 Sealed truck-style enclosure with one 12" Prime subwoofer at Crutchfield
Amazon.com: PIONEER 12" Single 1500W Slim Box W WOOF : Electronics
Pioneer TS-A2000LD2 - 8” Shallow-Mount Subwoofer with 700 Watts Max. Power - Walmart.com